A few weeks (or months) ago..I had a showa shipped to me with a slightly red, damaged dorsal fin. I thought it was minor..so, did nothing. I showed the fish here weeks later when the fin was eaten away and the bone was sticking out. I said, I wished I had acted sooner and injected!! That fish recovered..but will never be shown (most likely).
So, My favorite Hosokai showa..my 2 time Kokugyu winner..has died today. I saw 2 weeks ago that it's dorsal fin was damaged (here is the picture..looking stressed from capture) I don't know how it happened..looked like trauma. Maybe it jumped..or an animal..or something. All my other fish are perfect. This was always a very aggressive koi..First up to eat..and real pushy about it!! I decided not to wait this time. Injected nuflor, cleaned with iodine..and back in the pond. Well, 2 days ago(about 12 days later)...the fish was glowing red. Looked like a cellulitis. I put it in a hospital tank..and injected baytril. I also put iodine on the wound one more time. It received shot #2 yesterday. Today, I went to give it shot #3...and there it was belly-up. I'm not sure what I could have done differently?? I don't treat..things went lousy. I decide to treat the next time..and things went worse

!!! The thing that kills me is the fish was doing incredible. Went from 8.5 to 14 inches in 4-5months.
It's going to be tough to replace this one for me. Definitely going to miss Mr. Perfect. Any advice on what else I could have done is appreciated.